undulated

例句：

1. 1. The river undulated gently through the valley.
   河流在山谷中轻轻蜿蜒。
2. 2. The waves undulated as they crashed against the shore.
   波浪拍打着岸边，起伏不定。
3. 3. The road undulated through the forest.
   道路在森林中蜿蜒曲折。